forked from OSchip/llvm-project
979 lines
44 KiB
CMake
979 lines
44 KiB
CMake
# See https://libcxx.llvm.org/docs/BuildingLibcxx.html for instructions on how
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# to build libcxx with CMake.
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if (NOT IS_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/../libcxxabi")
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message(FATAL_ERROR "libc++ now requires being built in a monorepo layout with libcxxabi available")
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endif()
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#===============================================================================
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# Setup Project
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#===============================================================================
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cmake_minimum_required(VERSION 3.13.4)
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set(LLVM_COMMON_CMAKE_UTILS "${CMAKE_CURRENT_SOURCE_DIR}/../cmake")
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# Add path for custom modules
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list(INSERT CMAKE_MODULE_PATH 0
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
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"${LLVM_COMMON_CMAKE_UTILS}"
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"${LLVM_COMMON_CMAKE_UTILS}/Modules"
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)
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set(CMAKE_FOLDER "libc++")
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set(LIBCXX_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
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set(LIBCXX_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
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set(LIBCXX_BINARY_INCLUDE_DIR "${LIBCXX_BINARY_DIR}/include/c++build")
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if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBCXX_STANDALONE_BUILD)
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project(libcxx CXX C)
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set(PACKAGE_NAME libcxx)
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set(PACKAGE_VERSION 14.0.0git)
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set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
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set(PACKAGE_BUGREPORT "llvm-bugs@lists.llvm.org")
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# In a standalone build, we don't have llvm to automatically generate the
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# llvm-lit script for us. So we need to provide an explicit directory that
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# the configurator should write the script into.
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set(LIBCXX_STANDALONE_BUILD 1)
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set(LLVM_LIT_OUTPUT_DIR "${LIBCXX_BINARY_DIR}/bin")
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# Find the LLVM sources and simulate LLVM CMake options.
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include(HandleOutOfTreeLLVM)
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endif()
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if (LIBCXX_STANDALONE_BUILD)
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find_package(Python3 COMPONENTS Interpreter)
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if(NOT Python3_Interpreter_FOUND)
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message(SEND_ERROR "Python3 not found. Python3 is required")
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endif()
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endif()
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# Require out of source build.
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include(MacroEnsureOutOfSourceBuild)
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MACRO_ENSURE_OUT_OF_SOURCE_BUILD(
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"${PROJECT_NAME} requires an out of source build. Please create a separate
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build directory and run 'cmake /path/to/${PROJECT_NAME} [options]' there."
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)
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if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" AND "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
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message(STATUS "Configuring for clang-cl")
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set(LIBCXX_TARGETING_CLANG_CL ON)
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endif()
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if (MSVC)
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set(LIBCXX_TARGETING_MSVC ON)
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message(STATUS "Configuring for MSVC")
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else()
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set(LIBCXX_TARGETING_MSVC OFF)
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endif()
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#===============================================================================
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# Setup CMake Options
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#===============================================================================
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include(CMakeDependentOption)
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include(HandleCompilerRT)
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# Basic options ---------------------------------------------------------------
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option(LIBCXX_ENABLE_ASSERTIONS "Enable assertions independent of build mode." OFF)
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option(LIBCXX_ENABLE_SHARED "Build libc++ as a shared library." ON)
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option(LIBCXX_ENABLE_STATIC "Build libc++ as a static library." ON)
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option(LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY "Build libc++experimental.a" ON)
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set(ENABLE_FILESYSTEM_DEFAULT ON)
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if (WIN32 AND NOT MINGW)
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# Filesystem is buildable for windows, but it requires __int128 helper
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# functions, that currently are provided by libgcc or compiler_rt builtins.
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# These are available in MinGW environments, but not currently in MSVC
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# environments.
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set(ENABLE_FILESYSTEM_DEFAULT OFF)
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endif()
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option(LIBCXX_ENABLE_FILESYSTEM "Build filesystem as part of the main libc++ library"
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${ENABLE_FILESYSTEM_DEFAULT})
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option(LIBCXX_INCLUDE_TESTS "Build the libc++ tests." ${LLVM_INCLUDE_TESTS})
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option(LIBCXX_ENABLE_PARALLEL_ALGORITHMS "Enable the parallel algorithms library. This requires the PSTL to be available." OFF)
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option(LIBCXX_ENABLE_DEBUG_MODE_SUPPORT
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"Whether to include support for libc++'s debugging mode in the library.
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By default, this is turned on. If you turn it off and try to enable the
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debug mode when compiling a program against libc++, it will fail to link
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since the required support isn't provided in the library." ON)
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option(LIBCXX_ENABLE_RANDOM_DEVICE
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"Whether to include support for std::random_device in the library. Disabling
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this can be useful when building the library for platforms that don't have
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a source of randomness, such as some embedded platforms. When this is not
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supported, most of <random> will still be available, but std::random_device
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will not." ON)
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option(LIBCXX_ENABLE_LOCALIZATION
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"Whether to include support for localization in the library. Disabling
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localization can be useful when porting to platforms that don't support
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the C locale API (e.g. embedded). When localization is not supported,
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several parts of the library will be disabled: <iostream>, <regex>, <locale>
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will be completely unusable, and other parts may be only partly available." ON)
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option(LIBCXX_ENABLE_UNICODE
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"Whether to include support for Unicode in the library. Disabling Unicode can
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be useful when porting to platforms that don't support UTF-8 encoding (e.g.
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embedded)." ON)
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option(LIBCXX_ENABLE_WIDE_CHARACTERS
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"Whether to include support for wide characters in the library. Disabling
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wide character support can be useful when porting to platforms that don't
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support the C functionality for wide characters. When wide characters are
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not supported, several parts of the library will be disabled, notably the
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wide character specializations of std::basic_string." ON)
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option(LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS
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"Whether to turn on vendor availability annotations on declarations that depend
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on definitions in a shared library. By default, we assume that we're not building
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libc++ for any specific vendor, and we disable those annotations. Vendors wishing
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to provide compile-time errors when using features unavailable on some version of
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the shared library they shipped should turn this on and see `include/__availability`
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for more details." OFF)
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option(LIBCXX_ENABLE_INCOMPLETE_FEATURES
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"Whether to enable support for incomplete library features. Incomplete features
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are new library features under development. These features don't guarantee
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ABI stability nor the quality of completed library features. Vendors
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shipping the library may want to disable this option." ON)
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set(LIBCXX_TEST_CONFIG "legacy.cfg.in" CACHE STRING
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"The path to the Lit testing configuration to use when running the tests.
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If a relative path is provided, it is assumed to be relative to '<monorepo>/libcxx/test/configs'.")
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if (NOT IS_ABSOLUTE "${LIBCXX_TEST_CONFIG}")
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set(LIBCXX_TEST_CONFIG "${CMAKE_CURRENT_SOURCE_DIR}/test/configs/${LIBCXX_TEST_CONFIG}")
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endif()
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set(LIBCXX_TEST_PARAMS "" CACHE STRING
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"A list of parameters to run the Lit test suite with.")
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# Benchmark options -----------------------------------------------------------
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option(LIBCXX_INCLUDE_BENCHMARKS "Build the libc++ benchmarks and their dependencies" ON)
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set(LIBCXX_BENCHMARK_TEST_ARGS_DEFAULT --benchmark_min_time=0.01)
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set(LIBCXX_BENCHMARK_TEST_ARGS "${LIBCXX_BENCHMARK_TEST_ARGS_DEFAULT}" CACHE STRING
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"Arguments to pass when running the benchmarks using check-cxx-benchmarks")
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set(LIBCXX_BENCHMARK_NATIVE_STDLIB "" CACHE STRING
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"Build the benchmarks against the specified native STL.
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The value must be one of libc++/libstdc++")
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set(LIBCXX_BENCHMARK_NATIVE_GCC_TOOLCHAIN "" CACHE STRING
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"Use alternate GCC toolchain when building the native benchmarks")
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if (LIBCXX_BENCHMARK_NATIVE_STDLIB)
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if (NOT (LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libc++"
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OR LIBCXX_BENCHMARK_NATIVE_STDLIB STREQUAL "libstdc++"))
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message(FATAL_ERROR "Invalid value for LIBCXX_BENCHMARK_NATIVE_STDLIB: "
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"'${LIBCXX_BENCHMARK_NATIVE_STDLIB}'")
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endif()
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endif()
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option(LIBCXX_INCLUDE_DOCS "Build the libc++ documentation." ${LLVM_INCLUDE_DOCS})
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set(LIBCXX_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
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"Define suffix of library directory name (32/64)")
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option(LIBCXX_INSTALL_HEADERS "Install the libc++ headers." ON)
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option(LIBCXX_INSTALL_LIBRARY "Install the libc++ library." ON)
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cmake_dependent_option(LIBCXX_INSTALL_STATIC_LIBRARY
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"Install the static libc++ library." ON
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"LIBCXX_ENABLE_STATIC;LIBCXX_INSTALL_LIBRARY" OFF)
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cmake_dependent_option(LIBCXX_INSTALL_SHARED_LIBRARY
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"Install the shared libc++ library." ON
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"LIBCXX_ENABLE_SHARED;LIBCXX_INSTALL_LIBRARY" OFF)
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cmake_dependent_option(LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY
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"Install libc++experimental.a" ON
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"LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY;LIBCXX_INSTALL_LIBRARY" OFF)
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set(LIBCXX_ABI_VERSION "1" CACHE STRING "ABI version of libc++. Can be either 1 or 2, where 2 is currently not stable. Defaults to 1.")
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set(LIBCXX_ABI_NAMESPACE "" CACHE STRING "The inline ABI namespace used by libc++. It defaults to __n where `n` is the current ABI version.")
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option(LIBCXX_ABI_UNSTABLE "Unstable ABI of libc++." OFF)
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option(LIBCXX_ABI_FORCE_ITANIUM "Ignore auto-detection and force use of the Itanium ABI.")
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option(LIBCXX_ABI_FORCE_MICROSOFT "Ignore auto-detection and force use of the Microsoft ABI.")
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set(LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION "default" CACHE STRING
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"Override the implementation to use for comparing typeinfos. By default, this
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is detected automatically by the library, but this option allows overriding
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which implementation is used unconditionally.
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See the documentation in <libcxx/include/typeinfo> for details on what each
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value means.")
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set(TYPEINFO_COMPARISON_VALUES "default;1;2;3")
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if (NOT ("${LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION}" IN_LIST TYPEINFO_COMPARISON_VALUES))
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message(FATAL_ERROR "Value '${LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION}' is not a valid value for
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LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION")
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endif()
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option(LIBCXX_HIDE_FROM_ABI_PER_TU_BY_DEFAULT "Enable per TU ABI insulation by default. To be used by vendors." OFF)
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set(LIBCXX_ABI_DEFINES "" CACHE STRING "A semicolon separated list of ABI macros to define in the site config header.")
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option(LIBCXX_EXTRA_SITE_DEFINES "Extra defines to add into __config_site")
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option(LIBCXX_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
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set(LIBCXX_LIBCPPABI_VERSION "2" CACHE STRING "Version of libc++abi's ABI to re-export from libc++ when re-exporting is enabled.
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Note that this is not related to the version of libc++'s ABI itself!")
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# ABI Library options ---------------------------------------------------------
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set(LIBCXX_CXX_ABI "default" CACHE STRING "Specify C++ ABI library to use.")
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set(CXXABIS none default libcxxabi libcxxrt libstdc++ libsupc++ vcruntime)
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set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS ;${CXXABIS})
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# Setup the default options if LIBCXX_CXX_ABI is not specified.
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if (LIBCXX_CXX_ABI STREQUAL "default")
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if (LIBCXX_TARGETING_MSVC)
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# FIXME: Figure out how to configure the ABI library on Windows.
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set(LIBCXX_CXX_ABI_LIBNAME "vcruntime")
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elseif (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
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set(LIBCXX_CXX_ABI_LIBNAME "libcxxrt")
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elseif (NOT LIBCXX_STANDALONE_BUILD OR HAVE_LIBCXXABI)
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set(LIBCXX_CXX_ABI_LIBNAME "libcxxabi")
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else()
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set(LIBCXX_CXX_ABI_LIBNAME "default")
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endif()
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else()
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set(LIBCXX_CXX_ABI_LIBNAME "${LIBCXX_CXX_ABI}")
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endif()
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option(LIBCXX_ENABLE_STATIC_ABI_LIBRARY
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"Use a static copy of the ABI library when linking libc++.
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This option cannot be used with LIBCXX_ENABLE_ABI_LINKER_SCRIPT." OFF)
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cmake_dependent_option(LIBCXX_STATICALLY_LINK_ABI_IN_STATIC_LIBRARY
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"Statically link the ABI library to static library" ON
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"LIBCXX_ENABLE_STATIC_ABI_LIBRARY;LIBCXX_ENABLE_STATIC" OFF)
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cmake_dependent_option(LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY
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"Statically link the ABI library to shared library" ON
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"LIBCXX_ENABLE_STATIC_ABI_LIBRARY;LIBCXX_ENABLE_SHARED" OFF)
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# Generate and install a linker script inplace of libc++.so. The linker script
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# will link libc++ to the correct ABI library. This option is on by default
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# on UNIX platforms other than Apple unless 'LIBCXX_ENABLE_STATIC_ABI_LIBRARY'
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# is on. This option is also disabled when the ABI library is not specified
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# or is specified to be "none".
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set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE OFF)
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if (LLVM_HAVE_LINK_VERSION_SCRIPT AND NOT LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY
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AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "none"
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AND NOT LIBCXX_CXX_ABI_LIBNAME STREQUAL "default"
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AND Python3_EXECUTABLE
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AND LIBCXX_ENABLE_SHARED)
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set(ENABLE_LINKER_SCRIPT_DEFAULT_VALUE ON)
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endif()
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option(LIBCXX_ENABLE_ABI_LINKER_SCRIPT
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"Use and install a linker script for the given ABI library"
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${ENABLE_LINKER_SCRIPT_DEFAULT_VALUE})
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option(LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS
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"Build libc++ with definitions for operator new/delete. These are normally
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defined in libc++abi, but this option can be used to define them in libc++
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instead. If you define them in libc++, make sure they are NOT defined in
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libc++abi. Doing otherwise is an ODR violation." OFF)
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# Build libc++abi with libunwind. We need this option to determine whether to
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# link with libunwind or libgcc_s while running the test cases.
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option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder." OFF)
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# Target options --------------------------------------------------------------
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option(LIBCXX_BUILD_32_BITS "Build 32 bit multilib libc++. This option is not supported anymore when building the runtimes. Please specify a full triple instead." ${LLVM_BUILD_32_BITS})
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if (LIBCXX_BUILD_32_BITS)
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message(FATAL_ERROR "LIBCXX_BUILD_32_BITS is not supported anymore when building the runtimes, please specify a full triple instead.")
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endif()
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if(CMAKE_CXX_COMPILER_TARGET)
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set(LIBCXX_DEFAULT_TARGET_TRIPLE "${CMAKE_CXX_COMPILER_TARGET}")
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else()
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set(LIBCXX_DEFAULT_TARGET_TRIPLE "${LLVM_DEFAULT_TARGET_TRIPLE}")
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endif()
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set(LIBCXX_TARGET_TRIPLE "${LIBCXX_DEFAULT_TARGET_TRIPLE}" CACHE STRING "Use alternate target triple.")
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set(LIBCXX_SYSROOT "${CMAKE_SYSROOT}" CACHE STRING "Use alternate sysroot.")
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set(LIBCXX_GCC_TOOLCHAIN "${CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN}" CACHE STRING "Use alternate GCC toolchain.")
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# Feature options -------------------------------------------------------------
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option(LIBCXX_ENABLE_EXCEPTIONS "Use exceptions." ON)
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option(LIBCXX_ENABLE_RTTI "Use run time type information." ON)
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option(LIBCXX_ENABLE_THREADS "Build libc++ with support for threads." ON)
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option(LIBCXX_ENABLE_MONOTONIC_CLOCK
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"Build libc++ with support for a monotonic clock.
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This option may only be set to OFF when LIBCXX_ENABLE_THREADS=OFF." ON)
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option(LIBCXX_HAS_MUSL_LIBC "Build libc++ with support for the Musl C library" OFF)
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option(LIBCXX_HAS_PTHREAD_API "Ignore auto-detection and force use of pthread API" OFF)
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option(LIBCXX_HAS_WIN32_THREAD_API "Ignore auto-detection and force use of win32 thread API" OFF)
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option(LIBCXX_HAS_EXTERNAL_THREAD_API
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"Build libc++ with an externalized threading API.
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This option may only be set to ON when LIBCXX_ENABLE_THREADS=ON." OFF)
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option(LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY
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"Build libc++ with an externalized threading library.
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This option may only be set to ON when LIBCXX_ENABLE_THREADS=ON" OFF)
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# Misc options ----------------------------------------------------------------
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# FIXME: Turn -pedantic back ON. It is currently off because it warns
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# about #include_next which is used everywhere.
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option(LIBCXX_ENABLE_PEDANTIC "Compile with pedantic enabled." OFF)
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option(LIBCXX_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
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|
option(LIBCXX_DISABLE_MACRO_CONFLICT_WARNINGS "Disable #warnings about conflicting macros." OFF)
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option(LIBCXX_GENERATE_COVERAGE "Enable generating code coverage." OFF)
|
|
set(LIBCXX_COVERAGE_LIBRARY "" CACHE STRING
|
|
"The Profile-rt library used to build with code coverage")
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|
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set(LIBCXX_CONFIGURE_IDE_DEFAULT OFF)
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|
if (XCODE OR MSVC_IDE)
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set(LIBCXX_CONFIGURE_IDE_DEFAULT ON)
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|
endif()
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option(LIBCXX_CONFIGURE_IDE "Configure libcxx for use within an IDE"
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|
${LIBCXX_CONFIGURE_IDE_DEFAULT})
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option(LIBCXX_HERMETIC_STATIC_LIBRARY
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|
"Do not export any symbols from the static library." OFF)
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#===============================================================================
|
|
# Check option configurations
|
|
#===============================================================================
|
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|
# Ensure LIBCXX_ENABLE_MONOTONIC_CLOCK is set to ON only when
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|
# LIBCXX_ENABLE_THREADS is on.
|
|
if(LIBCXX_ENABLE_THREADS AND NOT LIBCXX_ENABLE_MONOTONIC_CLOCK)
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|
message(FATAL_ERROR "LIBCXX_ENABLE_MONOTONIC_CLOCK can only be set to OFF"
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|
" when LIBCXX_ENABLE_THREADS is also set to OFF.")
|
|
endif()
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if(NOT LIBCXX_ENABLE_THREADS)
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|
if(LIBCXX_HAS_PTHREAD_API)
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|
message(FATAL_ERROR "LIBCXX_HAS_PTHREAD_API can only be set to ON"
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|
" when LIBCXX_ENABLE_THREADS is also set to ON.")
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|
endif()
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|
if(LIBCXX_HAS_EXTERNAL_THREAD_API)
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message(FATAL_ERROR "LIBCXX_HAS_EXTERNAL_THREAD_API can only be set to ON"
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|
" when LIBCXX_ENABLE_THREADS is also set to ON.")
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|
endif()
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|
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
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|
message(FATAL_ERROR "LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY can only be set "
|
|
"to ON when LIBCXX_ENABLE_THREADS is also set to ON.")
|
|
endif()
|
|
if (LIBCXX_HAS_WIN32_THREAD_API)
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|
message(FATAL_ERROR "LIBCXX_HAS_WIN32_THREAD_API can only be set to ON"
|
|
" when LIBCXX_ENABLE_THREADS is also set to ON.")
|
|
endif()
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endif()
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|
|
if (LIBCXX_HAS_EXTERNAL_THREAD_API)
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|
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
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|
message(FATAL_ERROR "The options LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY and "
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|
"LIBCXX_HAS_EXTERNAL_THREAD_API cannot both be ON at "
|
|
"the same time")
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endif()
|
|
if (LIBCXX_HAS_PTHREAD_API)
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|
message(FATAL_ERROR "The options LIBCXX_HAS_EXTERNAL_THREAD_API"
|
|
"and LIBCXX_HAS_PTHREAD_API cannot be both"
|
|
"set to ON at the same time.")
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|
endif()
|
|
if (LIBCXX_HAS_WIN32_THREAD_API)
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|
message(FATAL_ERROR "The options LIBCXX_HAS_EXTERNAL_THREAD_API"
|
|
"and LIBCXX_HAS_WIN32_THREAD_API cannot be both"
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|
"set to ON at the same time.")
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|
endif()
|
|
endif()
|
|
|
|
if (LIBCXX_HAS_PTHREAD_API)
|
|
if (LIBCXX_HAS_WIN32_THREAD_API)
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|
message(FATAL_ERROR "The options LIBCXX_HAS_PTHREAD_API"
|
|
"and LIBCXX_HAS_WIN32_THREAD_API cannot be both"
|
|
"set to ON at the same time.")
|
|
endif()
|
|
endif()
|
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|
# Ensure LLVM_USE_SANITIZER is not specified when LIBCXX_GENERATE_COVERAGE
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|
# is ON.
|
|
if (LLVM_USE_SANITIZER AND LIBCXX_GENERATE_COVERAGE)
|
|
message(FATAL_ERROR "LLVM_USE_SANITIZER cannot be used with LIBCXX_GENERATE_COVERAGE")
|
|
endif()
|
|
|
|
# Warn users that LIBCXX_ENABLE_STATIC_ABI_LIBRARY is an experimental option.
|
|
if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
|
|
message(WARNING "LIBCXX_ENABLE_STATIC_ABI_LIBRARY is an experimental option")
|
|
if (LIBCXX_ENABLE_STATIC AND NOT Python3_EXECUTABLE)
|
|
message(FATAL_ERROR "LIBCXX_ENABLE_STATIC_ABI_LIBRARY requires python but it was not found.")
|
|
endif()
|
|
endif()
|
|
|
|
if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
|
|
if (APPLE)
|
|
message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT cannot be used on APPLE targets")
|
|
endif()
|
|
if (NOT LIBCXX_ENABLE_SHARED)
|
|
message(FATAL_ERROR "LIBCXX_ENABLE_ABI_LINKER_SCRIPT is only available for shared library builds.")
|
|
endif()
|
|
endif()
|
|
|
|
if (LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
|
|
message(FATAL_ERROR "Conflicting options given.
|
|
LIBCXX_ENABLE_STATIC_ABI_LIBRARY cannot be specified with
|
|
LIBCXX_ENABLE_ABI_LINKER_SCRIPT")
|
|
endif()
|
|
|
|
if (LIBCXX_ABI_FORCE_ITANIUM AND LIBCXX_ABI_FORCE_MICROSOFT)
|
|
message(FATAL_ERROR "Only one of LIBCXX_ABI_FORCE_ITANIUM and LIBCXX_ABI_FORCE_MICROSOFT can be specified.")
|
|
endif ()
|
|
|
|
#===============================================================================
|
|
# Configure System
|
|
#===============================================================================
|
|
|
|
# TODO: Projects that depend on libc++ should use LIBCXX_GENERATED_INCLUDE_DIR
|
|
# instead of hard-coding include/c++/v1.
|
|
|
|
set(LIBCXX_INSTALL_INCLUDE_DIR "include/c++/v1" CACHE PATH
|
|
"Path where target-agnostic libc++ headers should be installed.")
|
|
set(LIBCXX_INSTALL_RUNTIME_DIR bin CACHE PATH
|
|
"Path where built libc++ runtime libraries should be installed.")
|
|
|
|
if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
|
|
set(LIBCXX_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE})
|
|
set(LIBCXX_GENERATED_INCLUDE_DIR "${LLVM_BINARY_DIR}/include/c++/v1")
|
|
set(LIBCXX_GENERATED_INCLUDE_TARGET_DIR "${LLVM_BINARY_DIR}/include/${LLVM_DEFAULT_TARGET_TRIPLE}/c++/v1")
|
|
set(LIBCXX_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE} CACHE PATH
|
|
"Path where built libc++ libraries should be installed.")
|
|
set(LIBCXX_INSTALL_INCLUDE_TARGET_DIR "include/${LLVM_DEFAULT_TARGET_TRIPLE}/c++/v1" CACHE PATH
|
|
"Path where target-specific libc++ headers should be installed.")
|
|
if(LIBCXX_LIBDIR_SUBDIR)
|
|
string(APPEND LIBCXX_LIBRARY_DIR /${LIBCXX_LIBDIR_SUBDIR})
|
|
string(APPEND LIBCXX_INSTALL_LIBRARY_DIR /${LIBCXX_LIBDIR_SUBDIR})
|
|
endif()
|
|
else()
|
|
if(LLVM_LIBRARY_OUTPUT_INTDIR)
|
|
set(LIBCXX_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
|
|
set(LIBCXX_GENERATED_INCLUDE_DIR "${LLVM_BINARY_DIR}/include/c++/v1")
|
|
else()
|
|
set(LIBCXX_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBCXX_LIBDIR_SUFFIX})
|
|
set(LIBCXX_GENERATED_INCLUDE_DIR "${CMAKE_BINARY_DIR}/include/c++/v1")
|
|
endif()
|
|
set(LIBCXX_GENERATED_INCLUDE_TARGET_DIR "${LIBCXX_GENERATED_INCLUDE_DIR}")
|
|
set(LIBCXX_INSTALL_LIBRARY_DIR lib${LIBCXX_LIBDIR_SUFFIX} CACHE PATH
|
|
"Path where built libc++ libraries should be installed.")
|
|
set(LIBCXX_INSTALL_INCLUDE_TARGET_DIR "${LIBCXX_INSTALL_INCLUDE_DIR}" CACHE PATH
|
|
"Path where target-specific libc++ headers should be installed.")
|
|
endif()
|
|
|
|
file(MAKE_DIRECTORY "${LIBCXX_BINARY_INCLUDE_DIR}")
|
|
|
|
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
|
|
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
|
|
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
|
|
|
|
# Declare libc++ configuration variables.
|
|
# They are intended for use as follows:
|
|
# LIBCXX_CXX_FLAGS: General flags for both the compiler and linker.
|
|
# LIBCXX_COMPILE_FLAGS: Compile only flags.
|
|
# LIBCXX_LINK_FLAGS: Linker only flags.
|
|
# LIBCXX_LIBRARIES: libraries libc++ is linked to.
|
|
set(LIBCXX_COMPILE_FLAGS "")
|
|
set(LIBCXX_LINK_FLAGS "")
|
|
set(LIBCXX_LIBRARIES "")
|
|
|
|
# Include macros for adding and removing libc++ flags.
|
|
include(HandleLibcxxFlags)
|
|
|
|
# Target flags ================================================================
|
|
# These flags get added to CMAKE_CXX_FLAGS and CMAKE_C_FLAGS so that
|
|
# 'config-ix' use them during feature checks. It also adds them to both
|
|
# 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'
|
|
if(LIBCXX_TARGET_TRIPLE)
|
|
add_target_flags_if_supported("--target=${LIBCXX_TARGET_TRIPLE}")
|
|
endif()
|
|
if(LIBCXX_SYSROOT)
|
|
add_target_flags_if_supported("--sysroot=${LIBCXX_SYSROOT}")
|
|
endif()
|
|
if(LIBCXX_GCC_TOOLCHAIN)
|
|
add_target_flags_if_supported("--gcc-toolchain=${LIBCXX_GCC_TOOLCHAIN}")
|
|
endif()
|
|
|
|
# Configure compiler.
|
|
include(config-ix)
|
|
|
|
# Configure coverage options.
|
|
if (LIBCXX_GENERATE_COVERAGE)
|
|
include(CodeCoverage)
|
|
set(CMAKE_BUILD_TYPE "COVERAGE" CACHE STRING "" FORCE)
|
|
endif()
|
|
|
|
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
|
|
if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
|
|
set(LIBCXX_DEBUG_BUILD ON)
|
|
else()
|
|
set(LIBCXX_DEBUG_BUILD OFF)
|
|
endif()
|
|
|
|
#===============================================================================
|
|
# Setup Compiler Flags
|
|
#===============================================================================
|
|
|
|
include(HandleLibCXXABI) # Setup the ABI library flags
|
|
|
|
if (NOT LIBCXX_STANDALONE_BUILD)
|
|
# Remove flags that may have snuck in.
|
|
remove_flags(-DNDEBUG -UNDEBUG -D_DEBUG
|
|
-lc++abi)
|
|
endif()
|
|
remove_flags(--stdlib=libc++ -stdlib=libc++ --stdlib=libstdc++ -stdlib=libstdc++)
|
|
|
|
# FIXME: Remove all debug flags and flags that change which Windows
|
|
# default libraries are linked. Currently we only support linking the
|
|
# non-debug DLLs
|
|
remove_flags("/D_DEBUG" "/MTd" "/MDd" "/MT" "/Md")
|
|
|
|
# FIXME(EricWF): See the FIXME on LIBCXX_ENABLE_PEDANTIC.
|
|
# Remove the -pedantic flag and -Wno-pedantic and -pedantic-errors
|
|
# so they don't get transformed into -Wno and -errors respectively.
|
|
remove_flags(-Wno-pedantic -pedantic-errors -pedantic)
|
|
|
|
# Required flags ==============================================================
|
|
function(cxx_add_basic_build_flags target)
|
|
|
|
# Require C++20 for all targets. C++17 is needed to use aligned allocation
|
|
# in the dylib. C++20 is needed to use char8_t.
|
|
set_target_properties(${target} PROPERTIES
|
|
CXX_STANDARD 20
|
|
CXX_STANDARD_REQUIRED YES
|
|
CXX_EXTENSIONS NO)
|
|
|
|
# When building the dylib, don't warn for unavailable aligned allocation
|
|
# functions based on the deployment target -- they are always available
|
|
# because they are provided by the dylib itself with the excepton of z/OS.
|
|
if (ZOS)
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -fno-aligned-allocation)
|
|
else()
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -faligned-allocation)
|
|
endif()
|
|
|
|
# On all systems the system c++ standard library headers need to be excluded.
|
|
# MSVC only has -X, which disables all default includes; including the crt.
|
|
# Thus, we do nothing and hope we don't accidentally include any of the C++
|
|
# headers
|
|
target_add_compile_flags_if_supported(${target} PUBLIC -nostdinc++)
|
|
|
|
# Hide all inline function definitions which have not explicitly been marked
|
|
# visible. This prevents new definitions for inline functions from appearing in
|
|
# the dylib when get ODR used by another function.
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -fvisibility-inlines-hidden)
|
|
|
|
# Our visibility annotations are not quite right for non-Clang compilers,
|
|
# so we end up not exporting all the symbols we should. In the future, we
|
|
# can improve the situation by providing an explicit list of exported
|
|
# symbols on all compilers.
|
|
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -fvisibility=hidden)
|
|
endif()
|
|
|
|
if (LIBCXX_CONFIGURE_IDE)
|
|
# This simply allows IDE to process <experimental/coroutine>
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -fcoroutines-ts)
|
|
endif()
|
|
|
|
# Let the library headers know they are currently being used to build the
|
|
# library.
|
|
target_compile_definitions(${target} PRIVATE -D_LIBCPP_BUILDING_LIBRARY)
|
|
|
|
if (NOT LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS)
|
|
target_compile_definitions(${target} PRIVATE -D_LIBCPP_DISABLE_NEW_DELETE_DEFINITIONS)
|
|
endif()
|
|
|
|
if (LIBCXX_HAS_COMMENT_LIB_PRAGMA)
|
|
if (LIBCXX_HAS_PTHREAD_LIB)
|
|
target_compile_definitions(${target} PRIVATE -D_LIBCPP_LINK_PTHREAD_LIB)
|
|
endif()
|
|
if (LIBCXX_HAS_RT_LIB)
|
|
target_compile_definitions(${target} PRIVATE -D_LIBCPP_LINK_RT_LIB)
|
|
endif()
|
|
endif()
|
|
endfunction()
|
|
|
|
# Warning flags ===============================================================
|
|
function(cxx_add_warning_flags target)
|
|
target_compile_definitions(${target} PUBLIC -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
if (MSVC)
|
|
# -W4 is the cl.exe/clang-cl equivalent of -Wall. (In cl.exe and clang-cl,
|
|
# -Wall is equivalent to -Weverything in GCC style compiler drivers.)
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -W4)
|
|
else()
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -Wall)
|
|
endif()
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -Wextra -W -Wwrite-strings
|
|
-Wno-unused-parameter -Wno-long-long
|
|
-Werror=return-type -Wextra-semi -Wundef
|
|
-Wformat-nonliteral)
|
|
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
|
|
target_add_compile_flags_if_supported(${target} PRIVATE
|
|
-Wno-user-defined-literals
|
|
-Wno-covered-switch-default
|
|
-Wno-suggest-override
|
|
)
|
|
if (LIBCXX_TARGETING_CLANG_CL)
|
|
target_add_compile_flags_if_supported(${target} PRIVATE
|
|
-Wno-c++98-compat
|
|
-Wno-c++98-compat-pedantic
|
|
-Wno-c++11-compat
|
|
-Wno-undef
|
|
-Wno-reserved-id-macro
|
|
-Wno-gnu-include-next
|
|
-Wno-gcc-compat # For ignoring "'diagnose_if' is a clang extension" warnings
|
|
-Wno-zero-as-null-pointer-constant # FIXME: Remove this and fix all occurrences.
|
|
-Wno-deprecated-dynamic-exception-spec # For auto_ptr
|
|
-Wno-sign-conversion
|
|
-Wno-old-style-cast
|
|
-Wno-deprecated # FIXME: Remove this and fix all occurrences.
|
|
-Wno-shift-sign-overflow # FIXME: Why do we need this with clang-cl but not clang?
|
|
-Wno-double-promotion # FIXME: remove me
|
|
)
|
|
endif()
|
|
elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
|
|
target_add_compile_flags_if_supported(${target} PRIVATE
|
|
-Wno-literal-suffix
|
|
-Wno-c++14-compat
|
|
-Wno-noexcept-type
|
|
-Wno-suggest-override)
|
|
endif()
|
|
if (LIBCXX_ENABLE_WERROR)
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -Werror)
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -WX)
|
|
else()
|
|
# TODO(EricWF) Remove this. We shouldn't be suppressing errors when -Werror is
|
|
# added elsewhere.
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -Wno-error)
|
|
endif()
|
|
if (LIBCXX_ENABLE_PEDANTIC)
|
|
target_add_compile_flags_if_supported(${target} PRIVATE -pedantic)
|
|
endif()
|
|
if (LIBCXX_DISABLE_MACRO_CONFLICT_WARNINGS)
|
|
target_compile_definitions(${target} PRIVATE -D_LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS)
|
|
endif()
|
|
endfunction()
|
|
|
|
# Exception flags =============================================================
|
|
function(cxx_add_exception_flags target)
|
|
if (LIBCXX_ENABLE_EXCEPTIONS)
|
|
# Catches C++ exceptions only and tells the compiler to assume that extern C
|
|
# functions never throw a C++ exception.
|
|
target_add_compile_flags_if_supported(${target} PUBLIC -EHsc)
|
|
else()
|
|
target_add_compile_flags_if_supported(${target} PUBLIC -EHs- -EHa-)
|
|
target_add_compile_flags_if_supported(${target} PUBLIC -fno-exceptions)
|
|
endif()
|
|
endfunction()
|
|
|
|
# RTTI flags ==================================================================
|
|
function(cxx_add_rtti_flags target)
|
|
if (NOT LIBCXX_ENABLE_RTTI)
|
|
target_add_compile_flags_if_supported(${target} PUBLIC -GR-)
|
|
target_add_compile_flags_if_supported(${target} PUBLIC -fno-rtti)
|
|
endif()
|
|
endfunction()
|
|
|
|
# Threading flags =============================================================
|
|
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXX_ENABLE_SHARED)
|
|
# Need to allow unresolved symbols if this is to work with shared library builds
|
|
if (APPLE)
|
|
add_link_flags("-undefined dynamic_lookup")
|
|
else()
|
|
# Relax this restriction from HandleLLVMOptions
|
|
string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
|
|
endif()
|
|
endif()
|
|
|
|
# Assertion flags =============================================================
|
|
define_if(LIBCXX_ENABLE_ASSERTIONS -UNDEBUG)
|
|
define_if_not(LIBCXX_ENABLE_ASSERTIONS -DNDEBUG)
|
|
define_if(LIBCXX_ENABLE_ASSERTIONS -D_LIBCPP_DEBUG=0)
|
|
define_if(LIBCXX_DEBUG_BUILD -D_DEBUG)
|
|
if (LIBCXX_ENABLE_ASSERTIONS AND NOT LIBCXX_DEBUG_BUILD)
|
|
# MSVC doesn't like _DEBUG on release builds. See PR 4379.
|
|
define_if_not(LIBCXX_TARGETING_MSVC -D_DEBUG)
|
|
endif()
|
|
|
|
# Modules flags ===============================================================
|
|
# FIXME The libc++ sources are fundamentally non-modular. They need special
|
|
# versions of the headers in order to provide C++03 and legacy ABI definitions.
|
|
# NOTE: The public headers can be used with modules in all other contexts.
|
|
function(cxx_add_module_flags target)
|
|
if (LLVM_ENABLE_MODULES)
|
|
# Ignore that the rest of the modules flags are now unused.
|
|
target_add_compile_flags_if_supported(${target} PUBLIC -Wno-unused-command-line-argument)
|
|
target_compile_options(${target} PUBLIC -fno-modules)
|
|
endif()
|
|
endfunction()
|
|
|
|
# Sanitizer flags =============================================================
|
|
|
|
function(get_sanitizer_flags OUT_VAR USE_SANITIZER)
|
|
set(SANITIZER_FLAGS)
|
|
set(USE_SANITIZER "${USE_SANITIZER}")
|
|
# NOTE: LLVM_USE_SANITIZER checks for a UNIX like system instead of MSVC.
|
|
# But we don't have LLVM_ON_UNIX so checking for MSVC is the best we can do.
|
|
if (USE_SANITIZER AND NOT MSVC)
|
|
append_flags_if_supported(SANITIZER_FLAGS "-fno-omit-frame-pointer")
|
|
append_flags_if_supported(SANITIZER_FLAGS "-gline-tables-only")
|
|
|
|
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
|
|
NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
|
|
append_flags_if_supported(SANITIZER_FLAGS "-gline-tables-only")
|
|
endif()
|
|
if (USE_SANITIZER STREQUAL "Address")
|
|
append_flags(SANITIZER_FLAGS "-fsanitize=address")
|
|
elseif (USE_SANITIZER MATCHES "Memory(WithOrigins)?")
|
|
append_flags(SANITIZER_FLAGS -fsanitize=memory)
|
|
if (USE_SANITIZER STREQUAL "MemoryWithOrigins")
|
|
append_flags(SANITIZER_FLAGS "-fsanitize-memory-track-origins")
|
|
endif()
|
|
elseif (USE_SANITIZER STREQUAL "Undefined")
|
|
append_flags(SANITIZER_FLAGS "-fsanitize=undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all")
|
|
elseif (USE_SANITIZER STREQUAL "Address;Undefined" OR
|
|
USE_SANITIZER STREQUAL "Undefined;Address")
|
|
append_flags(SANITIZER_FLAGS "-fsanitize=address,undefined -fno-sanitize=vptr,function -fno-sanitize-recover=all")
|
|
elseif (USE_SANITIZER STREQUAL "Thread")
|
|
append_flags(SANITIZER_FLAGS -fsanitize=thread)
|
|
elseif (USE_SANITIZER STREQUAL "DataFlow")
|
|
append_flags(SANITIZER_FLAGS -fsanitize=dataflow)
|
|
else()
|
|
message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${USE_SANITIZER}")
|
|
endif()
|
|
elseif(USE_SANITIZER AND MSVC)
|
|
message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
|
|
endif()
|
|
set(${OUT_VAR} "${SANITIZER_FLAGS}" PARENT_SCOPE)
|
|
endfunction()
|
|
|
|
# Configure for sanitizers. If LIBCXX_STANDALONE_BUILD then we have to do
|
|
# the flag translation ourselves. Othewise LLVM's CMakeList.txt will handle it.
|
|
if (LIBCXX_STANDALONE_BUILD)
|
|
set(LLVM_USE_SANITIZER "" CACHE STRING
|
|
"Define the sanitizer used to build the library and tests")
|
|
endif()
|
|
get_sanitizer_flags(SANITIZER_FLAGS "${LLVM_USE_SANITIZER}")
|
|
if (LIBCXX_STANDALONE_BUILD AND SANITIZER_FLAGS)
|
|
add_flags(${SANITIZER_FLAGS})
|
|
endif()
|
|
|
|
# Link system libraries =======================================================
|
|
function(cxx_link_system_libraries target)
|
|
|
|
# In order to remove just libc++ from the link step
|
|
# we need to use -nostdlib++ whenever it is supported.
|
|
# Unfortunately this cannot be used universally because for example g++ supports
|
|
# only -nodefaultlibs in which case all libraries will be removed and
|
|
# all libraries but c++ have to be added in manually.
|
|
if (LIBCXX_SUPPORTS_NOSTDLIBXX_FLAG)
|
|
target_add_link_flags_if_supported(${target} PRIVATE "-nostdlib++")
|
|
else()
|
|
target_add_link_flags_if_supported(${target} PRIVATE "-nodefaultlibs")
|
|
target_add_compile_flags_if_supported(${target} PRIVATE "/Zl")
|
|
target_add_link_flags_if_supported(${target} PRIVATE "/nodefaultlib")
|
|
endif()
|
|
|
|
if (LIBCXX_SUPPORTS_UNWINDLIB_NONE_FLAG AND LIBCXXABI_USE_LLVM_UNWINDER)
|
|
# If we're linking directly against the libunwind that we're building
|
|
# in the same invocation, don't try to link in the toolchain's
|
|
# default libunwind (which may be missing still).
|
|
target_add_link_flags_if_supported(${target} PRIVATE "--unwindlib=none")
|
|
endif()
|
|
|
|
if (LIBCXX_HAS_SYSTEM_LIB)
|
|
target_link_libraries(${target} PRIVATE System)
|
|
endif()
|
|
|
|
if (LIBCXX_HAS_PTHREAD_LIB)
|
|
target_link_libraries(${target} PRIVATE pthread)
|
|
endif()
|
|
|
|
if (LIBCXX_HAS_C_LIB)
|
|
target_link_libraries(${target} PRIVATE c)
|
|
endif()
|
|
|
|
if (LIBCXX_HAS_M_LIB)
|
|
target_link_libraries(${target} PRIVATE m)
|
|
endif()
|
|
|
|
if (LIBCXX_HAS_RT_LIB)
|
|
target_link_libraries(${target} PRIVATE rt)
|
|
endif()
|
|
|
|
if (LIBCXX_USE_COMPILER_RT)
|
|
find_compiler_rt_library(builtins LIBCXX_BUILTINS_LIBRARY)
|
|
if (LIBCXX_BUILTINS_LIBRARY)
|
|
target_link_libraries(${target} PRIVATE "${LIBCXX_BUILTINS_LIBRARY}")
|
|
endif()
|
|
elseif (LIBCXX_HAS_GCC_LIB)
|
|
target_link_libraries(${target} PRIVATE gcc)
|
|
elseif (LIBCXX_HAS_GCC_S_LIB)
|
|
target_link_libraries(${target} PRIVATE gcc_s)
|
|
endif()
|
|
|
|
if (LIBCXX_HAS_ATOMIC_LIB)
|
|
target_link_libraries(${target} PRIVATE atomic)
|
|
endif()
|
|
|
|
if (MINGW)
|
|
target_link_libraries(${target} PRIVATE "${MINGW_LIBRARIES}")
|
|
endif()
|
|
|
|
if (LIBCXX_TARGETING_MSVC)
|
|
if (LIBCXX_DEBUG_BUILD)
|
|
set(LIB_SUFFIX "d")
|
|
else()
|
|
set(LIB_SUFFIX "")
|
|
endif()
|
|
|
|
target_link_libraries(${target} PRIVATE ucrt${LIB_SUFFIX}) # Universal C runtime
|
|
target_link_libraries(${target} PRIVATE vcruntime${LIB_SUFFIX}) # C++ runtime
|
|
target_link_libraries(${target} PRIVATE msvcrt${LIB_SUFFIX}) # C runtime startup files
|
|
target_link_libraries(${target} PRIVATE msvcprt${LIB_SUFFIX}) # C++ standard library. Required for exception_ptr internals.
|
|
# Required for standards-complaint wide character formatting functions
|
|
# (e.g. `printfw`/`scanfw`)
|
|
target_link_libraries(${target} PRIVATE iso_stdio_wide_specifiers)
|
|
endif()
|
|
|
|
if (ANDROID AND ANDROID_PLATFORM_LEVEL LESS 21)
|
|
target_link_libraries(${target} PUBLIC android_support)
|
|
endif()
|
|
endfunction()
|
|
|
|
# Windows-related flags =======================================================
|
|
function(cxx_add_windows_flags target)
|
|
if(WIN32 AND NOT MINGW)
|
|
target_compile_definitions(${target} PRIVATE
|
|
# Ignore the -MSC_VER mismatch, as we may build
|
|
# with a different compatibility version.
|
|
_ALLOW_MSC_VER_MISMATCH
|
|
# Don't check the msvcprt iterator debug levels
|
|
# as we will define the iterator types; libc++
|
|
# uses a different macro to identify the debug
|
|
# level.
|
|
_ALLOW_ITERATOR_DEBUG_LEVEL_MISMATCH
|
|
# We are building the c++ runtime, don't pull in
|
|
# msvcprt.
|
|
_CRTBLD
|
|
# Don't warn on the use of "deprecated"
|
|
# "insecure" functions which are standards
|
|
# specified.
|
|
_CRT_SECURE_NO_WARNINGS
|
|
# Use the ISO conforming behaviour for conversion
|
|
# in printf, scanf.
|
|
_CRT_STDIO_ISO_WIDE_SPECIFIERS)
|
|
endif()
|
|
endfunction()
|
|
|
|
# Configuration file flags =====================================================
|
|
if (NOT LIBCXX_ABI_VERSION EQUAL 1)
|
|
config_define(${LIBCXX_ABI_VERSION} _LIBCPP_ABI_VERSION)
|
|
endif()
|
|
if (NOT LIBCXX_ABI_NAMESPACE STREQUAL "")
|
|
if (NOT LIBCXX_ABI_NAMESPACE MATCHES "__.*")
|
|
message(FATAL_ERROR "LIBCXX_ABI_NAMESPACE must be a reserved identifier.")
|
|
endif()
|
|
if (LIBCXX_ABI_NAMESPACE MATCHES "__[0-9]+$")
|
|
message(FATAL_ERROR "LIBCXX_ABI_NAMESPACE '${LIBCXX_ABI_NAMESPACE}' is reserved for use by libc++.")
|
|
endif()
|
|
config_define(${LIBCXX_ABI_NAMESPACE} _LIBCPP_ABI_NAMESPACE)
|
|
endif()
|
|
config_define_if(LIBCXX_ABI_UNSTABLE _LIBCPP_ABI_UNSTABLE)
|
|
config_define_if(LIBCXX_ABI_FORCE_ITANIUM _LIBCPP_ABI_FORCE_ITANIUM)
|
|
config_define_if(LIBCXX_ABI_FORCE_MICROSOFT _LIBCPP_ABI_FORCE_MICROSOFT)
|
|
config_define_if(LIBCXX_HIDE_FROM_ABI_PER_TU_BY_DEFAULT _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT)
|
|
config_define_if_not(LIBCXX_ENABLE_THREADS _LIBCPP_HAS_NO_THREADS)
|
|
config_define_if_not(LIBCXX_ENABLE_MONOTONIC_CLOCK _LIBCPP_HAS_NO_MONOTONIC_CLOCK)
|
|
if (NOT LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION STREQUAL "default")
|
|
config_define("${LIBCXX_TYPEINFO_COMPARISON_IMPLEMENTATION}" _LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION)
|
|
endif()
|
|
config_define_if(LIBCXX_HAS_PTHREAD_API _LIBCPP_HAS_THREAD_API_PTHREAD)
|
|
config_define_if(LIBCXX_HAS_EXTERNAL_THREAD_API _LIBCPP_HAS_THREAD_API_EXTERNAL)
|
|
config_define_if(LIBCXX_HAS_WIN32_THREAD_API _LIBCPP_HAS_THREAD_API_WIN32)
|
|
config_define_if(LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY _LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL)
|
|
config_define_if(LIBCXX_HAS_MUSL_LIBC _LIBCPP_HAS_MUSL_LIBC)
|
|
config_define_if(LIBCXX_NO_VCRUNTIME _LIBCPP_NO_VCRUNTIME)
|
|
config_define_if(LIBCXX_ENABLE_PARALLEL_ALGORITHMS _LIBCPP_HAS_PARALLEL_ALGORITHMS)
|
|
config_define_if_not(LIBCXX_ENABLE_FILESYSTEM _LIBCPP_HAS_NO_FILESYSTEM_LIBRARY)
|
|
config_define_if_not(LIBCXX_ENABLE_RANDOM_DEVICE _LIBCPP_HAS_NO_RANDOM_DEVICE)
|
|
config_define_if_not(LIBCXX_ENABLE_LOCALIZATION _LIBCPP_HAS_NO_LOCALIZATION)
|
|
config_define_if_not(LIBCXX_ENABLE_UNICODE _LIBCPP_HAS_NO_UNICODE)
|
|
config_define_if_not(LIBCXX_ENABLE_WIDE_CHARACTERS _LIBCPP_HAS_NO_WIDE_CHARACTERS)
|
|
config_define_if_not(LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS)
|
|
# Incomplete features get their own specific disabling flags. This makes it
|
|
# easier to grep for target specific flags once the feature is complete.
|
|
config_define_if_not(LIBCXX_ENABLE_INCOMPLETE_FEATURES _LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
|
|
config_define_if_not(LIBCXX_ENABLE_INCOMPLETE_FEATURES _LIBCPP_HAS_NO_INCOMPLETE_RANGES)
|
|
|
|
if (LIBCXX_ABI_DEFINES)
|
|
set(abi_defines)
|
|
foreach (abi_define ${LIBCXX_ABI_DEFINES})
|
|
if (NOT abi_define MATCHES "^_LIBCPP_ABI_")
|
|
message(SEND_ERROR "Invalid ABI macro ${abi_define} in LIBCXX_ABI_DEFINES")
|
|
endif()
|
|
list(APPEND abi_defines "#define ${abi_define}")
|
|
endforeach()
|
|
string(REPLACE ";" "\n" abi_defines "${abi_defines}")
|
|
config_define(${abi_defines} _LIBCPP_ABI_DEFINES)
|
|
endif()
|
|
|
|
if (LIBCXX_EXTRA_SITE_DEFINES)
|
|
set(extra_site_defines)
|
|
foreach (extra_site_define ${LIBCXX_EXTRA_SITE_DEFINES})
|
|
# Allow defines such as DEFINE=VAL, transformed into "#define DEFINE VAL".
|
|
string(REPLACE "=" " " extra_site_define "${extra_site_define}")
|
|
list(APPEND extra_site_defines "#define ${extra_site_define}")
|
|
endforeach()
|
|
string(REPLACE ";" "\n" extra_site_defines "${extra_site_defines}")
|
|
config_define(${extra_site_defines} _LIBCPP_EXTRA_SITE_DEFINES)
|
|
endif()
|
|
|
|
# By default libc++ on Windows expects to use a shared library, which requires
|
|
# the headers to use DLL import/export semantics. However when building a
|
|
# static library only we modify the headers to disable DLL import/export.
|
|
if (DEFINED WIN32 AND LIBCXX_ENABLE_STATIC AND NOT LIBCXX_ENABLE_SHARED)
|
|
message(STATUS "Generating custom __config for non-DLL Windows build")
|
|
config_define(ON _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
|
|
endif()
|
|
|
|
if (WIN32 AND LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
|
|
# If linking libcxxabi statically into libcxx, skip the dllimport attributes
|
|
# on symbols we refer to from libcxxabi.
|
|
add_definitions(-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
|
|
endif()
|
|
|
|
# Setup all common build flags =================================================
|
|
function(cxx_add_common_build_flags target)
|
|
cxx_add_basic_build_flags(${target})
|
|
cxx_add_warning_flags(${target})
|
|
cxx_add_windows_flags(${target})
|
|
cxx_add_exception_flags(${target})
|
|
cxx_add_rtti_flags(${target})
|
|
cxx_add_module_flags(${target})
|
|
cxx_link_system_libraries(${target})
|
|
endfunction()
|
|
|
|
#===============================================================================
|
|
# Setup Source Code And Tests
|
|
#===============================================================================
|
|
add_subdirectory(include)
|
|
add_subdirectory(src)
|
|
add_subdirectory(utils)
|
|
|
|
set(LIBCXX_TEST_DEPS "")
|
|
|
|
if (LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY)
|
|
list(APPEND LIBCXX_TEST_DEPS cxx_experimental)
|
|
endif()
|
|
|
|
if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
|
|
list(APPEND LIBCXX_TEST_DEPS cxx_external_threads)
|
|
endif()
|
|
|
|
if (LIBCXX_INCLUDE_BENCHMARKS)
|
|
add_subdirectory(benchmarks)
|
|
endif()
|
|
|
|
if (LIBCXX_INCLUDE_TESTS)
|
|
add_subdirectory(test)
|
|
add_subdirectory(lib/abi)
|
|
if (LIBCXX_STANDALONE_BUILD)
|
|
include(AddLLVM) # for get_llvm_lit_path
|
|
# Make sure the llvm-lit script is generated into the bin directory, and
|
|
# do it after adding all tests, since the generated script will only work
|
|
# correctly discovered tests against test locations from the source tree
|
|
# that have already been discovered.
|
|
add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/llvm-lit
|
|
${CMAKE_CURRENT_BINARY_DIR}/llvm-lit)
|
|
endif()
|
|
endif()
|
|
|
|
if (LIBCXX_INCLUDE_DOCS)
|
|
add_subdirectory(docs)
|
|
endif()
|